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100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2023 Jon Beniston, M7RCE //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_UTIL_MOVINGMAXIMUM_H
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#define INCLUDE_UTIL_MOVINGMAXIMUM_H
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#include <algorithm>
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#include <QDebug>
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// Calculates moving maximum over a number of samples
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template <typename T>
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class MovingMaximum
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{
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public:
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MovingMaximum() :
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m_samples(nullptr),
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m_size(0)
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{
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reset();
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}
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~MovingMaximum()
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{
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delete[] m_samples;
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}
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void reset()
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{
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m_count = 0;
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m_index = 0;
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m_max = NAN;
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}
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void setSize(int size)
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{
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delete[] m_samples;
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m_samples = new T[size]();
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m_size = size;
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reset();
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}
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void operator()(T sample)
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{
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if (m_count < m_size)
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{
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m_samples[m_count++] = sample;
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if (m_count == 1) {
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m_max = sample;
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} else {
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m_max = std::max(m_max, sample);
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}
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}
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else
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{
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T oldest = m_samples[m_index];
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m_samples[m_index] = sample;
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m_index = (m_index + 1) % m_size;
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m_max = std::max(m_max, sample);
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if (oldest >= m_max)
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{
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// Find new maximum, that will be lower than the oldest sample
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m_max = m_samples[0];
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for (unsigned int i = 1; i < m_size; i++) {
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m_max = std::max(m_max, m_samples[i]);
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}
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}
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}
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}
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T getMaximum() const {
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return m_max;
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}
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private:
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T *m_samples;
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unsigned int m_size; // Max number of samples
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unsigned int m_count; // Number of samples used
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unsigned int m_index; // Current index
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T m_max;
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};
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#endif /* INCLUDE_UTIL_MOVINGMAXIMUM_H */
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